"While I certainly haven't read every story on this site, I've noticed a certain trend in the "teen" stories that is starting to bug me"
I know what you mean, but is this just because people are supposed to, have more fantasys than about other types of victims?
Personally I prefer stories where victimes are in their 20's - 40's.
I think this is pretty much a question of taste.
Also I don't think they are being wrecked rather broken in. In fantasy the laws of physics & biology can be broken.
Perhaps it is more a case that some of these stories can be repetative. Maybe writers need to make the stories more personal, even if this alienates some readers?
Just thinking aloud.